+++ /dev/null
-/*
-Copyright (C) 1999-2006 Id Software, Inc. and contributors.
-For a list of contributors, see the accompanying CONTRIBUTORS file.
-
-This file is part of GtkRadiant.
-
-GtkRadiant is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-GtkRadiant is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GtkRadiant; if not, write to the Free Software
-Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-*/
-
-#include "qbsp.h"
-
-/*
-
-tag all brushes with original contents
-brushes may contain multiple contents
-there will be no brush overlap after csg phase
-
-
-
-
-each side has a count of the other sides it splits
-
-the best split will be the one that minimizes the total split counts
-of all remaining sides
-
-precalc side on plane table
-
-evaluate split side
-{
-cost = 0
-for all sides
- for all sides
- get
- if side splits side and splitside is on same child
- cost++;
-}
-
-
- */
-
-void SplitBrush2 (bspbrush_t *brush, int planenum,
- bspbrush_t **front, bspbrush_t **back)
-{
- SplitBrush (brush, planenum, front, back);
-#if 0
- if (*front && (*front)->sides[(*front)->numsides-1].texinfo == -1)
- (*front)->sides[(*front)->numsides-1].texinfo = (*front)->sides[0].texinfo; // not -1
- if (*back && (*back)->sides[(*back)->numsides-1].texinfo == -1)
- (*back)->sides[(*back)->numsides-1].texinfo = (*back)->sides[0].texinfo; // not -1
-#endif
-}
-
-/*
-===============
-SubtractBrush
-
-Returns a list of brushes that remain after B is subtracted from A.
-May by empty if A is contained inside B.
-
-The originals are undisturbed.
-===============
-*/
-bspbrush_t *SubtractBrush (bspbrush_t *a, bspbrush_t *b)
-{ // a - b = out (list)
- int i;
- bspbrush_t *front, *back;
- bspbrush_t *out, *in;
-
- in = a;
- out = NULL;
- for (i=0 ; i<b->numsides && in ; i++)
- {
- SplitBrush2 (in, b->sides[i].planenum, &front, &back);
- if (in != a)
- FreeBrush (in);
- if (front)
- { // add to list
- front->next = out;
- out = front;
- }
- in = back;
- }
- if (in)
- FreeBrush (in);
- else
- { // didn't really intersect
- FreeBrushList (out);
- return a;
- }
- return out;
-}
-
-/*
-===============
-IntersectBrush
-
-Returns a single brush made up by the intersection of the
-two provided brushes, or NULL if they are disjoint.
-
-The originals are undisturbed.
-===============
-*/
-bspbrush_t *IntersectBrush (bspbrush_t *a, bspbrush_t *b)
-{
- int i;
- bspbrush_t *front, *back;
- bspbrush_t *in;
-
- in = a;
- for (i=0 ; i<b->numsides && in ; i++)
- {
- SplitBrush2 (in, b->sides[i].planenum, &front, &back);
- if (in != a)
- FreeBrush (in);
- if (front)
- FreeBrush (front);
- in = back;
- }
-
- if (in == a)
- return NULL;
-
- in->next = NULL;
- return in;
-}
-
-
-/*
-===============
-BrushesDisjoint
-
-Returns true if the two brushes definately do not intersect.
-There will be false negatives for some non-axial combinations.
-===============
-*/
-qboolean BrushesDisjoint (bspbrush_t *a, bspbrush_t *b)
-{
- int i, j;
-
- // check bounding boxes
- for (i=0 ; i<3 ; i++)
- if (a->mins[i] >= b->maxs[i]
- || a->maxs[i] <= b->mins[i])
- return true; // bounding boxes don't overlap
-
- // check for opposing planes
- for (i=0 ; i<a->numsides ; i++)
- {
- for (j=0 ; j<b->numsides ; j++)
- {
- if (a->sides[i].planenum ==
- (b->sides[j].planenum^1) )
- return true; // opposite planes, so not touching
- }
- }
-
- return false; // might intersect
-}
-
-/*
-===============
-IntersectionContents
-
-Returns a content word for the intersection of two brushes.
-Some combinations will generate a combination (water + clip),
-but most will be the stronger of the two contents.
-===============
-*/
-int IntersectionContents (int c1, int c2)
-{
- int out;
-
- out = c1 | c2;
-
- if (out & CONTENTS_SOLID)
- out = CONTENTS_SOLID;
-
- return out;
-}
-
-
-int minplanenums[3];
-int maxplanenums[3];
-
-/*
-===============
-ClipBrushToBox
-
-Any planes shared with the box edge will be set to no texinfo
-===============
-*/
-bspbrush_t *ClipBrushToBox (bspbrush_t *brush, vec3_t clipmins, vec3_t clipmaxs)
-{
- int i, j;
- bspbrush_t *front, *back;
- int p;
-
- for (j=0 ; j<2 ; j++)
- {
- if (brush->maxs[j] > clipmaxs[j])
- {
- SplitBrush (brush, maxplanenums[j], &front, &back);
- if (front)
- FreeBrush (front);
- brush = back;
- if (!brush)
- return NULL;
- }
- if (brush->mins[j] < clipmins[j])
- {
- SplitBrush (brush, minplanenums[j], &front, &back);
- if (back)
- FreeBrush (back);
- brush = front;
- if (!brush)
- return NULL;
- }
- }
-
- // remove any colinear faces
-
- for (i=0 ; i<brush->numsides ; i++)
- {
- p = brush->sides[i].planenum & ~1;
- if (p == maxplanenums[0] || p == maxplanenums[1]
- || p == minplanenums[0] || p == minplanenums[1])
- {
- brush->sides[i].texinfo = TEXINFO_NODE;
- brush->sides[i].visible = false;
- }
- }
- return brush;
-}
-
-/*
-===============
-MakeBspBrushList
-===============
-*/
-bspbrush_t *MakeBspBrushList (int startbrush, int endbrush,
- vec3_t clipmins, vec3_t clipmaxs)
-{
- mapbrush_t *mb;
- bspbrush_t *brushlist, *newbrush;
- int i, j;
- int c_faces;
- int c_brushes;
- int numsides;
- int vis;
- vec3_t normal;
- float dist;
-
- for (i=0 ; i<2 ; i++)
- {
- VectorClear (normal);
- normal[i] = 1;
- dist = clipmaxs[i];
- maxplanenums[i] = FindFloatPlane (normal, dist);
- dist = clipmins[i];
- minplanenums[i] = FindFloatPlane (normal, dist);
- }
-
- brushlist = NULL;
- c_faces = 0;
- c_brushes = 0;
-
- for (i=startbrush ; i<endbrush ; i++)
- {
- mb = &mapbrushes[i];
-
- numsides = mb->numsides;
- if (!numsides)
- continue;
- // make sure the brush has at least one face showing
- vis = 0;
- for (j=0 ; j<numsides ; j++)
- if (mb->original_sides[j].visible && mb->original_sides[j].winding)
- vis++;
-#if 0
- if (!vis)
- continue; // no faces at all
-#endif
- // if the brush is outside the clip area, skip it
- for (j=0 ; j<3 ; j++)
- if (mb->mins[j] >= clipmaxs[j]
- || mb->maxs[j] <= clipmins[j])
- break;
- if (j != 3)
- continue;
-
- //
- // make a copy of the brush
- //
- newbrush = AllocBrush (mb->numsides);
- newbrush->original = mb;
- newbrush->numsides = mb->numsides;
- memcpy (newbrush->sides, mb->original_sides, numsides*sizeof(side_t));
- for (j=0 ; j<numsides ; j++)
- {
- if (newbrush->sides[j].winding)
- newbrush->sides[j].winding = CopyWinding (newbrush->sides[j].winding);
- if (newbrush->sides[j].surf & SURF_HINT)
- newbrush->sides[j].visible = true; // hints are always visible
- }
- VectorCopy (mb->mins, newbrush->mins);
- VectorCopy (mb->maxs, newbrush->maxs);
-
- //
- // carve off anything outside the clip box
- //
- newbrush = ClipBrushToBox (newbrush, clipmins, clipmaxs);
- if (!newbrush)
- continue;
-
- c_faces += vis;
- c_brushes++;
-
- newbrush->next = brushlist;
- brushlist = newbrush;
- }
-
- return brushlist;
-}
-
-/*
-===============
-AddBspBrushListToTail
-===============
-*/
-bspbrush_t *AddBrushListToTail (bspbrush_t *list, bspbrush_t *tail)
-{
- bspbrush_t *walk, *next;
-
- for (walk=list ; walk ; walk=next)
- { // add to end of list
- next = walk->next;
- walk->next = NULL;
- tail->next = walk;
- tail = walk;
- }
-
- return tail;
-}
-
-/*
-===========
-CullList
-
-Builds a new list that doesn't hold the given brush
-===========
-*/
-bspbrush_t *CullList (bspbrush_t *list, bspbrush_t *skip1)
-{
- bspbrush_t *newlist;
- bspbrush_t *next;
-
- newlist = NULL;
-
- for ( ; list ; list = next)
- {
- next = list->next;
- if (list == skip1)
- {
- FreeBrush (list);
- continue;
- }
- list->next = newlist;
- newlist = list;
- }
- return newlist;
-}
-
-
-/*
-==================
-WriteBrushMap
-==================
-*/
-void WriteBrushMap (char *name, bspbrush_t *list)
-{
- FILE *f;
- side_t *s;
- int i;
- winding_t *w;
-
- Sys_Printf ("writing %s\n", name);
- f = fopen (name, "wb");
- if (!f)
- Error ("Can't write %s\b", name);
-
- fprintf (f, "{\n\"classname\" \"worldspawn\"\n");
-
- for ( ; list ; list=list->next )
- {
- fprintf (f, "{\n");
- for (i=0,s=list->sides ; i<list->numsides ; i++,s++)
- {
- w = BaseWindingForPlane (mapplanes[s->planenum].normal, mapplanes[s->planenum].dist);
-
- fprintf (f,"( %i %i %i ) ", (int)w->p[0][0], (int)w->p[0][1], (int)w->p[0][2]);
- fprintf (f,"( %i %i %i ) ", (int)w->p[1][0], (int)w->p[1][1], (int)w->p[1][2]);
- fprintf (f,"( %i %i %i ) ", (int)w->p[2][0], (int)w->p[2][1], (int)w->p[2][2]);
-
- fprintf (f, "%s 0 0 0 1 1\n", texinfo[s->texinfo].texture);
- FreeWinding (w);
- }
- fprintf (f, "}\n");
- }
- fprintf (f, "}\n");
-
- fclose (f);
-
-}
-
-/*
-==================
-BrushGE
-
-Returns true if b1 is allowed to bite b2
-==================
-*/
-qboolean BrushGE (bspbrush_t *b1, bspbrush_t *b2)
-{
- // detail brushes never bite structural brushes
- if ( (b1->original->contents & CONTENTS_DETAIL)
- && !(b2->original->contents & CONTENTS_DETAIL) )
- return false;
- if (b1->original->contents & CONTENTS_SOLID)
- return true;
- return false;
-}
-
-/*
-=================
-ChopBrushes
-
-Carves any intersecting solid brushes into the minimum number
-of non-intersecting brushes.
-=================
-*/
-bspbrush_t *ChopBrushes (bspbrush_t *head)
-{
- bspbrush_t *b1, *b2, *next;
- bspbrush_t *tail;
- bspbrush_t *keep;
- bspbrush_t *sub, *sub2;
- int c1, c2;
-
- Sys_FPrintf( SYS_VRB, "---- ChopBrushes ----\n");
- Sys_FPrintf( SYS_VRB, "original brushes: %i\n", CountBrushList (head));
-
-#if 0
- if (startbrush == 0)
- WriteBrushList ("before.gl", head, false);
-#endif
- keep = NULL;
-
-newlist:
- // find tail
- if (!head)
- return NULL;
- for (tail=head ; tail->next ; tail=tail->next)
- ;
-
- for (b1=head ; b1 ; b1=next)
- {
- next = b1->next;
- for (b2=b1->next ; b2 ; b2 = b2->next)
- {
- if (BrushesDisjoint (b1, b2))
- continue;
-
- sub = NULL;
- sub2 = NULL;
- c1 = 999999;
- c2 = 999999;
-
- if ( BrushGE (b2, b1) )
- {
- sub = SubtractBrush (b1, b2);
- if (sub == b1)
- continue; // didn't really intersect
- if (!sub)
- { // b1 is swallowed by b2
- head = CullList (b1, b1);
- goto newlist;
- }
- c1 = CountBrushList (sub);
- }
-
- if ( BrushGE (b1, b2) )
- {
- sub2 = SubtractBrush (b2, b1);
- if (sub2 == b2)
- continue; // didn't really intersect
- if (!sub2)
- { // b2 is swallowed by b1
- FreeBrushList (sub);
- head = CullList (b1, b2);
- goto newlist;
- }
- c2 = CountBrushList (sub2);
- }
-
- if (!sub && !sub2)
- continue; // neither one can bite
-
- // only accept if it didn't fragment
- // (commening this out allows full fragmentation)
- if (c1 > 1 && c2 > 1)
- {
- if (sub2)
- FreeBrushList (sub2);
- if (sub)
- FreeBrushList (sub);
- continue;
- }
-
- if (c1 < c2)
- {
- if (sub2)
- FreeBrushList (sub2);
- tail = AddBrushListToTail (sub, tail);
- head = CullList (b1, b1);
- goto newlist;
- }
- else
- {
- if (sub)
- FreeBrushList (sub);
- tail = AddBrushListToTail (sub2, tail);
- head = CullList (b1, b2);
- goto newlist;
- }
- }
-
- if (!b2)
- { // b1 is no longer intersecting anything, so keep it
- b1->next = keep;
- keep = b1;
- }
- }
-
- Sys_FPrintf( SYS_VRB, "output brushes: %i\n", CountBrushList (keep));
-#if 0
- {
- WriteBrushList ("after.gl", keep, false);
- WriteBrushMap ("after.map", keep);
- }
-#endif
- return keep;
-}
-
-
-/*
-=================
-InitialBrushList
-=================
-*/
-bspbrush_t *InitialBrushList (bspbrush_t *list)
-{
- bspbrush_t *b;
- bspbrush_t *out, *newb;
- int i;
-
- // only return brushes that have visible faces
- out = NULL;
- for (b=list ; b ; b=b->next)
- {
-#if 0
- for (i=0 ; i<b->numsides ; i++)
- if (b->sides[i].visible)
- break;
- if (i == b->numsides)
- continue;
-#endif
- newb = CopyBrush (b);
- newb->next = out;
- out = newb;
-
- // clear visible, so it must be set by MarkVisibleFaces_r
- // to be used in the optimized list
- for (i=0 ; i<b->numsides ; i++)
- {
- newb->sides[i].original = &b->sides[i];
-// newb->sides[i].visible = true;
- b->sides[i].visible = false;
- }
- }
-
- return out;
-}
-
-/*
-=================
-OptimizedBrushList
-=================
-*/
-bspbrush_t *OptimizedBrushList (bspbrush_t *list)
-{
- bspbrush_t *b;
- bspbrush_t *out, *newb;
- int i;
-
- // only return brushes that have visible faces
- out = NULL;
- for (b=list ; b ; b=b->next)
- {
- for (i=0 ; i<b->numsides ; i++)
- if (b->sides[i].visible)
- break;
- if (i == b->numsides)
- continue;
- newb = CopyBrush (b);
- newb->next = out;
- out = newb;
- }
-
-// WriteBrushList ("vis.gl", out, true);
-
- return out;
-}
projects / voretournament / voretournament.git / blobdiff